公开(公告)号：US08084128B2

公开(公告)日：2011-12-27

申请号：US12964402

申请日：2010-12-09

申请人： Matahiro Komuro ,  Yuichi Satsu

发明人： Matahiro Komuro ,  Yuichi Satsu

IPC分类号： B32B5/16 ,  H01F1/057

CPC分类号： H01F1/0572 ,  H01F41/0293 ,  Y10T428/2991

摘要： The object of the present invention is to provide a rare earth magnet which enables to achieve a good balance between high coercive force and high residual magnetic flux density, and its manufacturing method. The present invention provides a rare earth magnet in which a layered grain boundary phase is formed on a surface or a portion of a grain boundary of Nd2Fe14B which is a main phase of an R—Fe—B (R is a rare-earth element) based magnet, and wherein the grain boundary phase contains a fluoride compound, and wherein a thickness of the fluoride compound is 10 μm or less, or a thickness of the fluoride compound is from 0.1 μm to 10 μm, and wherein the coverage of the fluoride compound over a main phase particle is 50% or more on average. Moreover, after layering fluoride compound powder, which is formed in plate-like shape, in the grain boundary phase, the rare earth magnet is manufactured by quenching the layered compound after melting it at a vacuum atmosphere at a predetermined temperature, or by heating and pressing the main phase and the fluoride compound to make the fluoride compound into a layered fluoride compound along the grain boundary phase.

摘要翻译： 本发明的目的是提供一种能够在高矫顽力和高残留磁通密度之间实现良好平衡的稀土类磁铁及其制造方法。 本发明提供一种稀土类磁体，其中在作为R-Fe-B（R为稀土元素）的主相的Nd2Fe14B的晶界的一部分表面上形成层状晶界相， 并且其中所述晶界相包含氟化物，并且其中所述氟化物的厚度为10μm以下，或所述氟化物的厚度为0.1μm〜10μm，并且其中所述氟化物的覆盖率 主相粒子上的化合物平均为50％以上。 此外，在晶界相中形成板状的氟化物复合粉末之后，通过在预定温度下在真空气氛下或通过加热熔化之后将层状化合物淬火来制造稀土磁铁， 按下主相和氟化物，使氟化合物沿着晶界相成为层状氟化物。

公开(公告)号：US08075707B2

公开(公告)日：2011-12-13

申请号：US11916506

申请日：2007-03-28

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： H01F1/057

CPC分类号： B22F7/02 ,  C21D6/00 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293

摘要： A method for preparing a rare earth permanent magnet material comprises the steps of disposing a powder on a surface of a sintered magnet body of R1aTbAcMd composition wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, A is boron (B) and/or carbon (C), M is Al, Cu, Zn, In, Si, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, said powder comprising an oxide of R2, a fluoride of R3 or an oxyfluoride of R4 wherein R2, R3, and R4 are rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, heat treating the magnet body and the powder at a temperature equal to or below the sintering temperature of the magnet body for absorption treatment for causing R2, R3, and R4 in the powder to be absorbed in the magnet body, and repeating the absorption treatment at least two times. According to the invention, a rare earth permanent magnet material can be prepared as an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

摘要翻译： 一种制备稀土永磁材料的方法包括以下步骤：在R1aTbAcMd组合物的烧结磁体的表面上设置粉末，其中R1是包括Sc和Y的稀土元素，T是Fe和/或Co，A 是硼（B）和/或碳（C），M是Al，Cu，Zn，In，Si，P，S，Ti，V，Cr，Mn，Ni，Ga，Ge，Zr，Nb，Mo， ，Ag，Cd，Sn，Sb，Hf，Ta或W，所述粉末包含R2的氧化物，R3的氟化物或R4的氟氧化物，其中R2，R3和R4是包括Sc和Y的稀土元素， 具有等于​​或小于100μm的平均粒度，在等于或低于磁体的烧结温度的温度下对磁体和粉末进行热处理以进行吸收处理，以使粉末中的R2，R3和R4成为 被吸收在磁体中，并且重复吸收处理至少两次。 根据本发明，稀土永磁材料可以制备成具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

公开(公告)号：US20110189498A1

公开(公告)日：2011-08-04

申请号：US13119993

申请日：2009-10-06

申请人： Hiroshi Nagata ,  Yoshinori Shingaki ,  Youichi Hirose ,  Kyoutoshi Miyagi

发明人： Hiroshi Nagata ,  Yoshinori Shingaki ,  Youichi Hirose ,  Kyoutoshi Miyagi

IPC分类号： C25D1/08 ,  B22D23/04 ,  B22D29/00

CPC分类号： B22D23/04 ,  C21D1/72 ,  C21D6/00 ,  C23C2/04 ,  H01F41/0293 ,  Y10T428/12361

摘要： There is provided an evaporating material of thin plate shape which can be manufactured at a reduced cost and at high productivity, the evaporating material being adapted for use in enhancing the coercive force of neodymium-iron-boron sintered magnet by heat treatment while evaporating Dy in vacuum or in reduced-pressure inert gas atmosphere. The evaporating material of this invention has a core member la made of a fire-resistant metal having a multiplicity of through holes, and is made by melting a rare-earth metal or an alloy thereof so as to get adhered to, and solidified on, the core member. In this case, the above-mentioned adhesion is performed by dipping the core member into a molten bath of the rare-earth metal or an alloy thereof, and pulling it out of the molten bath.

摘要翻译： 提供了一种薄板状的蒸发材料，其可以以低成本和高生产率制造，该蒸发材料适用于通过热处理提高钕铁硼烧结磁体的矫顽力，同时将Dy 真空或在减压惰性气体气氛中。 本发明的蒸发材料具有由具有多个通孔的耐火金属制成的芯部件1a，并且通过熔化稀土金属或其合金制成，以使其粘附并固化， 核心成员。 在这种情况下，通过将芯构件浸入稀土金属或其合金的熔池中并将其从熔浴中拉出来进行上述粘合。

公开(公告)号：US20110090032A1

公开(公告)日：2011-04-21

申请号：US12913217

申请日：2010-10-27

申请人： Hiroaki Nagata ,  Tadao Nomura ,  Takehisa Minowa

发明人： Hiroaki Nagata ,  Tadao Nomura ,  Takehisa Minowa

IPC分类号： H01F7/02

CPC分类号： H01F1/0577 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C2202/02 ,  H01F41/0293

摘要： A rare earth permanent magnet is prepared by disposing a powdered metal alloy containing at least 70 vol % of an intermetallic compound phase on a sintered body of R—Fe—B system, and heating the sintered body having the powder disposed on its surface below the sintering temperature of the sintered body in vacuum or in an inert gas for diffusion treatment. The advantages include efficient productivity, excellent magnetic performance, a minimal or zero amount of Tb or Dy used, an increased coercive force, and a minimized decline of remanence.

公开(公告)号：US07927501B2

公开(公告)日：2011-04-19

申请号：US11943215

申请日：2007-11-20

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Hiroyuki Suzuki

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Hiroyuki Suzuki

IPC分类号： H01F1/08

CPC分类号： H01F1/0576 ,  B22F3/26 ,  B22F2003/248 ,  B22F2009/048 ,  B22F2998/10 ,  C22C2202/02 ,  H01F41/0293 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/2991 ,  B22F9/04 ,  B22F3/02 ,  B22F3/24

摘要： A magnet comprising magnetic powder containing at least one rare earth metal element, and an oxide binder for binding the magnetic powder, wherein an inter-face distance of the binder determined by diffraction analysis is 0.25 to 2.94 nm. The disclosure also discloses a method of manufacturing a magnet comprising; compacting magnetic powder containing at least one rare earth element under pressure in a mold; impregnating the compacted magnetic powder molding with a precursor solution of an oxide material; and heat-treating the compacted magnetic molding impregnated with the precursor thereby to impart an inter-face distance determined by diffraction analysis to the binder in the compacted molding. The distance is 0.25 to 2.94 nm.

摘要翻译： 包含含有至少一种稀土金属元素的磁性粉末和用于粘结磁性粉末的氧化物粘合剂的磁体，其中通过衍射分析确定的粘合剂的面间距离为0.25至2.94nm。 本公开还公开了一种制造磁体的方法，包括： 在模具中压制含有至少一种稀土元素的压粉磁粉; 用氧化物材料的前体溶液浸渍压实的磁性粉末成型体; 并且对浸渍有前体的压制磁性成型体进行热处理，从而通过衍射分析确定在压制成型体中的粘合剂的面间距离。 距离为0.25至2.94nm。

公开(公告)号：US20110080065A1

公开(公告)日：2011-04-07

申请号：US12889849

申请日：2010-09-24

申请人： Naoki Watanabe ,  Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

发明人： Naoki Watanabe ,  Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

IPC分类号： H02K21/24

CPC分类号： H02K1/2793 ,  H01F41/0293

摘要： An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece.

摘要翻译： 一种轴向间隙型永磁旋转机械，包括：转子，其包括具有旋转轴的旋转轴，从轴径向延伸的盘形转子轭，以及周向布置在转子轭的表面上的多个永磁体段 使得每个永磁体段可以具有平行于旋转轴线的磁化方向，以及具有多个周向排列的线圈并且被设置成限定与转子的轴向间隙的定子。 在转子中，每个永磁体段是两个或更多个分开的永磁体片的组件，并且磁体片表面附近的矫顽力高于磁片内部的矫顽力。

公开(公告)号：US20110052799A1

公开(公告)日：2011-03-03

申请号：US12863338

申请日：2009-02-18

申请人： Hiroshi Nagata ,  Yoshinori Shingaki

发明人： Hiroshi Nagata ,  Yoshinori Shingaki

IPC分类号： B05D5/00

CPC分类号： C23C14/5806 ,  B22F3/24 ,  B22F8/00 ,  B22F9/04 ,  B22F2003/241 ,  B22F2003/248 ,  B22F2998/10 ,  C22C33/0278 ,  C22C2202/02 ,  C23C10/06 ,  C23C14/16 ,  H01F1/0577 ,  H01F41/0293 ,  Y02P10/24 ,  Y02W30/541 ,  B22F3/10

摘要： The method has the steps of: grinding a recovered scrap magnet which is an iron-boron-rare earth-based sintered magnet, thereby obtaining a scrap-derived recovered raw material powder; obtaining a sintered body from the scrap-derived recovered raw material powder by a powder metallurgy method; and processing the sintered body. The processing includes the steps of: heating the sintered body disposed in a processing chamber; evaporating a metal evaporating material containing at least one of Dy and Tb in which the metal evaporating material is disposed in the same or another processing chamber; adhering metal atoms evaporated in the evaporating step to a surface of the sintered body while controlling a supply amount of the evaporated metal atoms; and diffusing the adhered metal atoms into grain boundaries and/or grain boundary phases of the sintered body.

摘要翻译： 该方法具有以下步骤：研磨作为铁 - 硼 - 稀土类烧结磁体的回收废铁，从而获得废料源的回收原料粉末; 通过粉末冶金法从废料回收的原料粉末中获得烧结体; 并加工烧结体。 该处理包括以下步骤：加热设置在处理室中的烧结体; 蒸发含有其中金属蒸发材料设置在相同或另一处理室中的Dy和Tb中的至少一种的金属蒸发材料; 在蒸发的金属原子的供给量的同时控制在蒸发工序中蒸发的金属原子到烧结体的表面; 并将附着的金属原子扩散到烧结体的晶界和/或晶界相。

公开(公告)号：US20110043311A1

公开(公告)日：2011-02-24

申请号：US12937870

申请日：2009-04-14

申请人： Izumi Ozeki ,  Katsuya Kume ,  Junichi Nakayama ,  Yuuki Fukuda ,  Toshinobu Hoshino ,  Tomokazu Horio

发明人： Izumi Ozeki ,  Katsuya Kume ,  Junichi Nakayama ,  Yuuki Fukuda ,  Toshinobu Hoshino ,  Tomokazu Horio

IPC分类号： H01F7/02 ,  B28B1/24

CPC分类号： H01F41/0266 ,  B22F1/0059 ,  B22F2003/023 ,  C22C38/002 ,  C22C38/005 ,  H01F1/0572 ,  H01F1/0577 ,  H01F7/02 ,  H01F41/0293

摘要： The present invention relates to a permanent magnet manufactured by steps of: pulverizing a magnet raw material; mixing the pulverized magnet raw material with a rust preventive oil in which a Dy compound or a Tb compound is dissolved, thereby preparing a slurry; compression molding the slurry to form a molded body; and sintering the molded body.

摘要翻译： 永磁体技术领域本发明涉及一种永久磁铁，其特征在于，将磁铁原料粉碎， 将粉碎的磁体原料与其中溶解有Dy化合物或Tb化合物的防锈油混合，从而制备浆料; 压制成型浆料以形成成型体; 并烧结成型体。

公开(公告)号：US07883587B2

公开(公告)日：2011-02-08

申请号：US11941127

申请日：2007-11-16

申请人： Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/053

CPC分类号： B22F3/24 ,  B22F2003/248 ,  C22C33/0278 ,  C22C2202/02 ,  H01F1/058 ,  H01F1/059 ,  H01F41/0293

摘要： A rare earth permanent magnet is prepared by providing a sintered magnet body consisting of 12-17 at % of rare earth, 3-15 at % of B, 0.01-11 at % of metal element, 0.1-4 at % of O, 0.05-3 at % of C, 0.01-1 at % of N, and the balance of Fe, disposing on a surface of the magnet body a powder comprising an oxide, fluoride and/or oxyfluoride of another rare earth, and heat treating the powder-covered magnet body at a temperature below the sintering temperature in vacuum or in an inert gas, for causing the other rare earth to be absorbed in the magnet body.

摘要翻译： 通过提供一种烧结磁体制备稀土永磁体，该磁体由12-17at％的稀土，3-15at％的B，0.01-11at％的金属元素，0.1-4at％的O，0.05 -3at％的C，0.01-1at％的N，余量为Fe，在磁体的表面上设置包含另一稀土的氧化物，氟化物和/或氟氧化物的粉末，并将粉末热处理 在低于真空或惰性气体中的烧结温度的温度下，使其它稀土被吸收在磁体中。

公开(公告)号：US20100282371A1

公开(公告)日：2010-11-11

申请号：US12812379

申请日：2009-01-09

申请人： Masato Sagawa ,  Naoki Fujimoto

发明人： Masato Sagawa ,  Naoki Fujimoto

IPC分类号： H01F1/057 ,  B05D5/00 ,  B32B15/01

CPC分类号： H01F41/005 ,  H01F1/0557 ,  H01F1/057 ,  H01F41/0293

摘要： The present invention is aimed at providing a method for producing an NdFeB sintered magnet having a higher coercivity and higher squareness of the magnetization curve than ever before. A method for producing an NdFeB sintered magnet according to the present invention includes the steps of forming a layer containing Dy and/or Tb on the surface of an NdFeB sintered magnet base material and then performing a grain boundary diffusion process for diffusing Dy and/or Tb from the aforementioned layer through the crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than the sintering temperature thereof, and this method is characterized in that a) the content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %; b) the aforementioned layer is a powder layer formed by depositing a powder; and c) the powder layer contains Dy and/or Tb in a metallic state by an amount equal to or higher than 50 mass %.

摘要翻译： 本发明旨在提供一种制造具有比以前更高的矫顽力和较高的磁化曲线矩形度的NdFeB烧结磁体的方法。 根据本发明的NdFeB烧结磁体的制造方法包括以下步骤：在NdFeB烧结磁体基材的表面上形成含有Dy和/或Tb的层，然后进行扩散Dy和/或 Tb通过将磁体基材加热到等于或低于其烧结温度的温度，通过磁体基材的晶界进入磁体基材，该方法的特征在于a）含量 在磁体基材中处于金属状态的稀土的含量等于或高于12.7at％; b）上述层是通过沉积粉末形成的粉末层; 和c）粉末层含有金属状态的Dy和/或Tb等于或高于50质量％的量。